JP4710394B2 - Ground plate mounting structure - Google Patents

Description

The present invention relates to a static electricity countermeasure in an electronic device such as an AV device, and further to a ground plate mounting structure used for a high frequency shield.

2. Description of the Related Art Conventionally, electronic devices represented by AV devices such as CDs, videos, DVDs, and the like have been provided with countermeasures against static electricity (static discharge prevention measures) for preventing so-called electrostatic breakdown. For example, when an input terminal or operation button of an electronic device is touched with a finger, an electrostatic charge charged on a human body is discharged to a conductive portion of a circuit board inside the electronic device, thereby destroying a semiconductor component or the like. It is something like that.

In order to prevent such electrostatic breakdown, a configuration in which the chassis and the front panel are electrically connected by a ground member has been conventionally employed. However, simply connecting the chassis and the front panel in this way may result in insufficient measures to prevent electrostatic breakdown, and it is also necessary to provide high-frequency shielding for the entire interior of the electronic device. In some cases, the front panel and the top cover are electrically connected to each other.

In addition, Patent Document 1 discloses an electrostatic breakdown prevention device that reduces the number of parts of a ground member for protecting an electronic device from static electricity, and at the same time simplifies the process, thereby reducing the manufacturing cost. . In addition, a pressure in the direction of the decorative plate is applied to the rising surface of the ground plate, and the protrusion of the ground plate is brought into contact with the back surface of the decorative plate by the pressing, and the projecting piece and the decorative plate are brought into contact with each other for electrical conduction. A ground plate mounting structure which is surely made is disclosed in Patent Document 2.
Japanese Patent Laid-Open No. 2000-223853 Japanese Utility Model Publication No. 3-50756

However, for existing equipment having only a configuration for electrically connecting the chassis and the front panel, a configuration for electrically connecting the front panel and the top cover is added as a new measure. In this case, it is necessary to secure a space for attaching the ground plate. In this case, in order to attach a new ground plate to the front panel, it is usually necessary to change the shape of the front panel significantly. May cause trouble.

Further, in the configuration as described in Patent Document 1 and Patent Document 2, a process for attaching a ground member to the chassis or the front panel is separately required, and when a ground plate is provided as a new measure for existing equipment. Cannot be adopted. In view of the above problems, an object of the present invention is to provide an earth plate attachment structure that can be attached to a front panel with almost no change in the shape of the front panel.

To achieve the above object, according to the present invention, an aluminum front panel that fits outside the resin front panel and a ground plate that electrically connects a top cover that is connected to the rear of the aluminum front panel. An opening provided on the rear side of the hook extending from the front edge on the front side of the resin front panel to the back side in order to engage with a rib projecting from the ceiling surface of the aluminum front panel. The ground plate passes from the upper side to the lower side, and its one end engages with the upper end edge on the back side of the resin front panel, so that the earth plate surrounds the upper end on the back side of the resin front panel. And the other end of the ground plate protrudes obliquely upward from the rear side upper edge of the resin front panel toward the rear. That.

Further, a projection is provided on a flat surface formed between one end of the ground plate and a bent portion provided adjacent thereto, and the ceiling of the aluminum front panel is pressed by the projection. It is characterized by becoming.

Further, the other end side of the ground plate is formed in a forked shape, a protrusion is provided on each other end, and the ceiling surface of the top cover is pressed by the protrusion.

The bent portion provided adjacent to one end of the ground plate is open so as to have an obtuse angle, thereby pressing the hook with the ground plate.

According to the present invention, it is possible to provide an earth plate attachment structure that can be attached to a front panel with a simple configuration without substantially changing the shape of the front panel.

Specifically, the ground plate passes through the opening provided behind the hook of the resin front panel from the upper side to the lower side, and one end of the ground plate engages with the upper edge of the back side of the resin front panel. Is installed so as to surround the upper end on the back side of the resin front panel,
The other end of the ground plate protrudes obliquely upward from the upper edge of the back side of the resin front panel toward the rear, so that the ground plate can be attached without changing the shape of the conventional resin front panel. It becomes possible.

In addition, a projection is provided on a flat surface formed between one end of the ground plate and a bent portion provided adjacent thereto, and the ceiling surface of the aluminum front panel is pressed by the projection. The earth plate and the aluminum front panel are in electrical contact with each other reliably.

Also, the other end side of the ground plate has a bifurcated shape, a projection is provided at each other end, and the top surface of the top cover is pressed by the projection so that the top cover can be easily attached. The deformation of the resin front panel is suppressed, and the ground plate and the top cover are reliably in electrical contact.

In addition, the bent part provided adjacent to one end of the ground plate is opened so that it has an obtuse angle, so that the hook of the resin front panel is pressed by the ground plate, so that this hook is an aluminum front panel. It will not come off the rib.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a rear perspective view of a resin front panel according to an embodiment of the present invention, in which FIG. 1 (a) shows a state where a ground plate is not attached, and FIG. 1 (b) shows a state where a ground plate is attached. . As shown in FIG. 2A, the resin-made resin front panel 1 has a plurality of portions in the longitudinal direction.
A hook 1a extending from the front side upper edge to the back side is disposed.

The hook 1a has an aluminum front panel, which will be described later, a resin front panel 1
When the outer side is fitted, the resin front panel 1 and the aluminum front panel are fixed by engaging with the rib on the aluminum front panel side. An opening 1aa is provided around the hook 1a on the upper front surface of the resin front panel 1 so that the hook 1a can be bent up and down around its front end (front panel front side end). It can be done.

On the other hand, similarly, the resin front panel 1 is provided with a raised portion 1b that rises from the upper end edge on the back side to the front side. The raised portions 1b are provided at a plurality of locations in the longitudinal direction of the resin front panel 1 and more than the hooks 1a, and have a function of securely fitting by pressing the ceiling surface of the aluminum front panel. Further, the raised portion 1b is always arranged to face the hook 1a. Furthermore, a rectangular notch 1c is provided at a position facing the hook 1a at the upper end edge on the back side of the resin front panel 1. Only the provision of the notch 1c is a change from the conventional front panel.

Now, as shown in FIG. 2B, a ground plate 2 is provided on the back side upper edge of the resin front panel 1 facing the hook 1a. This is the opening 1 behind the hook 1a.
Aa is passed from the upper side to the lower side, and one end thereof is engaged with the notch 1c, and is attached so as to surround the rear side upper end portion and the raised portion 1b of the resin front panel 1, and the other end is the rear side. It protrudes obliquely upward from the side upper edge toward the rear. Resin front panel 1
1d protruding rearward from the upper part of the inner wall surface of the front part is a guide rib for guiding the top cover mounting position.

FIG. 2 is a rear perspective view of the front panel in an assembled state according to the embodiment of the present invention.
As shown in the figure, the front panel F is assembled in a state where the aluminum front panel 3 is fitted to the outside of the resin front panel 1, and the ground plate 2 is rearward from the vicinity of the upper end on the back side of the front panel F. Projecting diagonally upward. As will be described later, the ground plate 2 is in electrical contact with the aluminum front panel 3, and the front panel F
Are provided at a plurality of locations (in the present embodiment, 5 locations) including the vicinity of both ends.

FIG. 3 is a view showing a ground plate mounting structure according to Embodiment 1 of the present invention.
) Is a side cross-sectional view showing a state of being attached to the front panel, and FIG. In addition,
In FIG. 6A, the state of the ground plate before the top cover is attached is indicated by a solid line, and the state after the attachment is indicated by a broken line. As shown in the figure, the earth plate 2 is made of an elastic member having a long plate shape, such as stainless steel or iron, and is bent in the same direction at several bent portions located in the longitudinal direction. It is formed in a generally spiral shape.

An engaging portion 2a, which is a bent portion having a substantially L shape in side view, is formed at one end of the ground plate 2. As described above, the ground plate 2 passes the opening 1aa behind the hook 1a from the upper side to the lower side. The ground plate 2 is attached so that the engaging portion 2a engages with the notch portion 1c and surrounds the upper end portion on the back side of the resin front panel 1 and the raised portion 1b. The other end of the ground plate 2 protrudes obliquely upward from the vicinity of the upper end edge on the back side of the front panel F toward the rear.

The specific attachment state of the ground plate 2 will be described. Between the engaging portion 2a and the bent portion 2b provided in the side view in a substantially L shape in a side view, the upper end on the back side of the resin front panel 1 The ground plate 2 is fixed to the resin front panel 1 by fitting. On the other hand, on the left and right ends of the plane portion formed between the engaging portion 2a and the bent portion 2b,
Protrusions 2c having a mountain shape in side view are provided and protrude upward.

Now, when the aluminum front panel 3 is fitted to the outside of the resin front panel 1 with the ground plate 2 provided as described above, the hook 1a of the resin front panel 1 is attached to the aluminum front panel as shown in FIG. The resin front panel 1 is fixed in the aluminum front panel 3 by engaging with ribs 3 a projecting downward from the ceiling surface of the panel 3.

At this time, the flat portion of the earth plate 2 is pressed against the ceiling surface of the aluminum front panel 3 by the raised portion 1b of the resin front panel 1, and the protruding portions 2c projecting upward from both left and right ends of the flat portion Press the ceiling surface of the aluminum front panel 3 at
By concentrating each of these forces at one point, the earth plate 2 and the aluminum front panel 3 are reliably in electrical contact.

In this state, the top cover 4 is attached to the front panel F. Specifically, the front end portion of the top cover 4 is fitted between a guide rib 1d projecting rearward from the upper part of the front inner wall surface of the resin front panel 1 and an upper end portion on the back side of the resin front panel 1, and aluminum With respect to the upper surface of the front panel 3, the upper surface of the top cover 4 is connected to the rear of the front panel 3 on substantially the same plane.

At this time, the other end of the ground plate 2 that originally protrudes upward from the upper surface of the aluminum front panel 3 is pushed down by the ceiling surface of the top cover 4. As a result, the elastic ground plate 2 is bent downward mainly with the bent portion 2b as the center, so that the other end presses the ceiling surface of the top cover 4 by the reaction, and the ground plate 2 and the top cover 4 are electrically connected. To touch. As described above, the aluminum front panel 3 and the top cover 4 are electrically connected via the ground plate 2. With this configuration, it is possible to provide a more reliable countermeasure against static electricity and high frequency shielding for the electronic device.

FIG. 4 is a view showing a ground plate mounting structure according to Embodiment 2 of the present invention.
) Is a side cross-sectional view showing a state of being attached to the front panel, and FIG. In addition,
In FIG. 6A, the state of the ground plate before the top cover is attached is indicated by a solid line, and the state after the attachment is indicated by a broken line. In this embodiment, in addition to the configuration of the first embodiment, as shown in the figure, the engaging portion 2a provided at one end of the ground plate 2 is used as a bent portion having a substantially U-shape when viewed from the side. 1 is reliably engaged with the notch 1c.

Moreover, it is set as the forked shape which deleted the inner side part from the bending part 2f of the earth plate 2 lower part to the other end. Thereby, since the elastic force of the earth plate 2 becomes weak, the top cover 4 can be easily attached and the deformation of the resin front panel 1 due to the elastic force is suppressed. Further, at each other end of the ground plate divided into two, a projection portion 2d having a mountain shape in rear view is provided and protrudes upward.

And since these two protrusion parts 2d press the ceiling surface of the top cover 4 at the pointed end, the ground plate 2 and the top cover 4 are surely electrically connected by concentrating each of these forces at one point. To touch. As described above, the aluminum front panel 3 and the top cover 4 are electrically connected via the ground plate 2. With this configuration, it is possible to provide a more reliable countermeasure against static electricity and high frequency shielding for the electronic device.

FIG. 5 is a view showing a ground plate mounting structure according to Embodiment 3 of the present invention.
) Is a side sectional view in a state of being attached to the front panel, and FIG. In addition, in the figure (a), the state of the earth plate before top cover attachment is shown as the continuous line, and the state after attachment is shown with the broken line.

In the present embodiment, in addition to the configuration of the second embodiment, as shown in the figure, the bent portion 2b of the ground plate 2 described above, which is substantially L-shaped, that is, a right angle, is opened so as to have an obtuse angle. It has a configuration. As a result, when the top cover 4 is attached, the ground plate 2 bends about the bent portion 2b and presses the hook 1a of the resin front panel 1 so that it does not come off the rib 3a of the aluminum front panel 3.

However, if the bent portion 2b of the ground plate 2 is made to have an obtuse angle, the ground plate 2 is likely to rattle and come off from the resin front panel 1, and in order to prevent this, the ground plate 2 is bent. A cut-and-raised portion 2e cut and raised backward is provided in the vicinity of the portion 2b. The ground plate 2 is fixed by sandwiching the upper end of the back side of the resin front panel 1 between the cut and raised portion 2e and the engaging portion 2a.

Note that the cut-and-raised portion 2e is provided so as to be in perpendicular contact with the front surface of the rear-side upper end portion of the resin front panel 1, as shown in FIG. Alternatively, as shown in FIG. 4B, when the cut-and-raised portion 2e is directed obliquely upward and is brought into contact with the front surface of the upper end of the back side of the resin front panel 1, the cut-and-raised portion 2e is resin front panel 1
Therefore, the earth plate 2 is more difficult to come off.

FIG. 6 is a view showing a specific example of the earth plate according to the present invention, in which FIG.
(B) is a side view, (c) is a bottom view, and (d) is a rear view. As shown in the figure, the earth plate 2 of this example has a bifurcated shape, and the engaging portion 2a has a substantially L shape in side view,
The bent portion 2b is open so as to have an obtuse angle, and has a structure in which a cut-and-raised portion 2e is provided in the vicinity thereof. That is, this example is a combination of the above-described Examples 1 to 3, and has a configuration that takes advantage of the features of each Example.

The present invention is not limited to a CD, a video, a DVD, and the like, and can be applied to any device that requires grounding.

The back side perspective view of the resin front panel in the embodiment of the present invention. The back side perspective view of the front panel of the assembly state in the embodiment of the present invention. The figure which shows the attachment structure of the earth plate which concerns on Example 1 of this invention. The figure which shows the attachment structure of the earth plate which concerns on Example 2 of this invention. The figure which shows the attachment structure of the earth plate which concerns on Example 3 of this invention. The figure which shows the specific example of the earth plate which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin front panel 1a Hook 1aa Opening part 1b Protrusion part 1c Notch part 1d Guide rib 2 Ground plate 2a Engagement part 2b, 2f Bending part 2c, 2d Protrusion part 2e Cut-raising part 3 Aluminum front panel 3a
F Front panel

Claims (5)

An aluminum front panel that fits outside the resin front panel, and a ground plate mounting structure that electrically connects a top cover that is connected to the rear of the aluminum front panel,
In order to engage with the rib projecting from the ceiling surface of the aluminum front panel, the ground plate is located above the opening provided on the rear side of the hook extending from the upper edge of the front side of the resin front panel to the back side. Is attached so as to surround the upper end on the back side of the resin front panel.
The ground plate is formed by bending a conductive elastic member in the same direction at several bent portions located in the longitudinal direction and forming a spiral shape when viewed from the side. Fitting with the upper end on the back side of the resin front panel between the engaging portion that engages with the upper edge and the bent portion provided adjacent to the engaging portion of the several bent portions And
The other end of the ground plate protrudes obliquely upward from the rear side upper edge of the resin front panel toward the rear,
The ground plate is provided with a protruding portion on a flat portion formed between the bent portion and the engaging portion provided adjacent to the engaging portion, and the protruding portion provides a ceiling surface of the aluminum front panel. The other end side of the ground plate has a bifurcated shape, a protrusion is provided on each other end, and the ceiling surface of the top cover is pressed by the protrusion,
The bent portion provided adjacent to one end of the ground plate is configured to open so as to have an obtuse angle, thereby pressing the hook with the ground plate,
A cut-and-raised portion is provided in the vicinity of a bent portion provided adjacent to one end of the ground plate, and an upper end on the back side of the resin front panel is sandwiched between the cut-and-raised portion and the one end. A featured earth plate mounting structure. An aluminum front panel that fits outside the resin front panel, and a ground plate mounting structure that electrically connects a top cover that is connected to the rear of the aluminum front panel,
In order to engage with the rib projecting from the ceiling surface of the aluminum front panel, the ground plate is located above the opening provided on the rear side of the hook extending from the upper edge of the front side of the resin front panel to the back side. Passing through the lower side of the resin front panel, one end of the resin front panel is engaged with the upper edge of the rear side of the resin front panel, and the ground plate is attached so as to surround the upper edge of the rear side of the resin front panel. The ground plate mounting structure is characterized in that the other end of the plate protrudes obliquely upward from the rear side upper edge of the resin front panel toward the rear. The ground plate is formed by bending a conductive elastic member in the same direction at several bent portions located in the longitudinal direction and forming a spiral shape when viewed from the side. Fitting with the upper end on the back side of the resin front panel between the engaging portion that engages with the upper edge and the bent portion provided adjacent to the engaging portion of the several bent portions And
The ground plate is provided with a protruding portion on a flat portion formed between the bent portion and the engaging portion provided adjacent to the engaging portion, and the protruding portion provides a ceiling surface of the aluminum front panel. The ground plate mounting structure according to claim 2, wherein the ground plate is pressed. Claim 3 wherein the engagement portion bent portion disposed adjacent to the ground plate is a structure that opens like an obtuse angle, thereby characterized in that it comprises as pressing the hook in the earth plate The ground plate mounting structure as described in 1. The other end side of the ground plate is formed in a forked shape, a protrusion is provided on each other end, and the ceiling surface of the top cover is pressed by the protrusion. 5. The ground plate mounting structure according to any one of 4 above.

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